What’s Vulnerable › Vulnerabilities
CVE-2026-27981: HomeBox has an Auth Rate Limit Bypass via IP Spoofing
- Severity: high (CVSS 7.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-03 · updated 2026-06-17
- Weakness: CWE-307
Description
HomeBox is a home inventory and organization system. Prior to 0.24.0, the authentication rate limiter (authRateLimiter) tracks failed attempts per client IP. It determines the client IP by reading, 1. X-Real-IP header, 2. First entry of X-Forwarded-For header, and 3. r.RemoteAddr (TCP connection address). These headers were read unconditionally. An attacker connecting directly to Homebox could forge any value in X-Real-IP, effectively getting a fresh rate limit identity per request. There is a TrustProxy option in the configuration (Options.TrustProxy, default false), but this option was never read by any middleware or rate limiter code. Additionally, chi's middleware.RealIP was applied unconditionally in main.go, overwriting r.RemoteAddr with the forged header value before it reaches any handler. This vulnerability is fixed in 0.24.0.
Affected products
- sysadminsmedia homebox: before 0.24.0 — fixed in 0.24.0
How to fix
Upgrade to a fixed version: sysadminsmedia homebox 0.24.0. Check the vendor advisory for mitigations.
References
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